edf99a5c17e31fbcc3fb64b6aa71880df3cd296e96345c94de8c09f4babf4157

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosdate	svchost.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/3068-0-0x0000000000400000-0x0000000000449000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\aaaaaaaa = "C:\\Windows\\System32\\aaaaaaaa.exe"	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2257386474-3982792636-3902186748-1000\Software\Microsoft\Windows\CurrentVersion\Run\aaaaaaaa = "C:\\Users\\Admin\\aaaaaaaa.exe"	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\aaaaaaaa.exe	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3068 set thread context of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	svchost.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	svchost.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosDate	svchost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30
PID 3068 wrote to memory of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30
PID 3068 wrote to memory of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30
PID 3068 wrote to memory of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30
PID 3068 wrote to memory of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30
PID 3068 wrote to memory of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30
PID 3068 wrote to memory of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30
PID 3068 wrote to memory of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30
PID 3068 wrote to memory of 2372	3068	b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b0846e7692b178a50b8e7c6369d900ee_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Windows\SysWOW64\svchost.exe
  C:\Windows\System32\svchost.exe
  2⤵
  - Checks BIOS information in registry
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  PID:2372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

3

System Location Discovery

T1614

System Language Discovery